Spinal dural needle method

A single needle is inserted into the epidural space and then advanced into the subarachnoid space.) The current preferred NTN technique involves the use of a separate epidural and spinal needle. Usually, the epidural space is located using traditional epidural needles and techniques, and a long spinal needle is then threaded through the epidural needle until cerebrospinal fluid appears in the socket of the spinal needle. The drug is passed through the spinal needle into the subarachnoid space, the spinal needle is removed, and the epidural catheter is inserted into the epidural space.

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